Air filter to carburetor attaching means



24, 1963 F. w. HAMILTON AIR FILTER T0 CARBURETOR ATTACHING MEANS FiledNov. 4, 1960 IN VEN TOR.

17770 FIVE/5'.

United States Patent Ofiice Patented Dec. 2%, 19%3 3,115,462 AER FTLTERT CAREURETUR ATTAQHHNG MEANS Francis W. Hamilton, Southfield, Mich,assignor to Chrysler Eorporation, Paris, Mich, a corporation of DelawareFiled Nov. 4, 1960, Eer. No. 67,155 2 Clm'ms. (El. 55--5@5) Thisinvention relates to improvements in devices for connecting air filtersto the carburetor inlets of internal combustion engines.

Heretofore various means have been employed to make this attachment suchas wire bales extending through the sides of the carburetor inlet orriveted thereto and connected to the air filter, and also by relativelysmall pins extending through portions of the carburetor inlet andsecuring thereto various filter attaching means. These devices have notproven entirely satisfactory in that the carburetor inlet is generally azinc die casting which is relatively soft metal and which does not havesuficient strength to prevent tearing loose of these bales and pins whenthe vehicle is driven over rough terrain and the air filter is subjectedto excessive vibrations and forces tending to lift it from thecarburetor inlet.

The present invention obviates these difficulties by providingsur'licient bearing area on the carburetor inlet for a single tubular orsolid anchor bar extending across the carburetor inlet and fixed inapertures in the sides thereof, the diameter of the bar being sufiicientto provide adequate bearing surface in said apertures in the carburetorinlet to prevent tearing of the die casting.

Another advantage of applicants invention is that the anchor bar isrelieved of excessive local stress tending to pull its ends inwardly ofthe inlet side walls. This is accomplished by the provision of aU-shaped element within the carburetor inlet wrapped around the baralong practically its entire length and having secured thereto anupstanding stud or nut to which the air filter is threadedly secured.

Further objects and advantages of the present invention will becomeapparent from the following description and drawings in which:

FIGURE 1 represents a cross-sectional view of a typical air filter andcarburetor inlet utilizing applicants attaching device;

FIGURE 2 represents a cross-sectional view of FIG- URE 1 taken along theline 2-2 thereof in the direction of the arrows;

FIGURE 3 represents a view looking into the inlet of the carburetor fromabove with the attaching device removed;

FIGURE 4 presents an isometric view of the U-shaped element of theattaching device; and

FIGURE 5 represents a cross-sectional view of the variation of thecrossbar of FIGURES 1 through 3.

Referring to the drawings, an air filter housing generally designated 19is provided with a tubular outlet portion 12 which fits over the inlet14 of a typical downdraft carburetor. The outlet 12 bottoms out againsta shoulder 16 of said carburetor inlet. Inlet 114 is provided atopposite sides with a pair of outwardly flared apertures 18 whichreceive the ends 20 in an anchor bar 22 to lock the same in place aftersaid ends have also been flared to fit the flared apertures 13. AU-shaped element 24 receives crossbar 22 and is nested in U-shaped slots26 in embossments 27 on the inlet Wall adjacent the apertures 18. ThisU-shaped element is welded or otherwise secured to a stud 28 which mayextend all the way through the filter element to receive a cap nut ormay threadedly receive an elongated type of nut as shown in FIGURE 1depending upon engineering design. The U-shaped member may alternativelybe provided with a nut and be secured to the filter 1% by a bolt in thesame manner as elongated nut 30. The anchor bar 22 and U-shaped elementmay conveniently be of metal or of rigid plastic material depending uponhow much force it is to withstand.

in FIGURE 5, the anchor bar 32 is provided with a shoulder 34 at one endso that the bar may be readily positioned in the inlet. The bar may besecured in position by any means such as staking shown at 36. Thisstructure further simplifies the installation by eliminating the flaringoperations.

I claim:

1. Means for attaching an air filter to the air inlet housing of acarburetor, a pair of substantially diametrically opposed embossments ofsaid inlet housing, each embossment having an axial slot therein openingupstream and radially inwardly with respect to said inlet housing andalso having a radial aperture extending from within the slot through thesidewall of said housing, each embossment providing a base for its slotat the downstream end thereof, a member adapted to span said inlethousing having a channel therein registering with said apertures andhaving a bottom wall supported at its opposite ends on said embossmentsat the base of each slot, the channel sides of said member at saidopposite ends being confined Within said slots respectively, an anchorbar having end portions engaged in said apertures and a lower surfaceportion engaging said bottom wall of said channel, cooperating means onsaid inlet housing and said anchor bar for locking said bar therein, andmeans extending into said channel and secured to said member forremovably attaching said fi ter to said carburetor, the last named meanshaving an extremity spaced from and opposed to said bottom wall of saidchannel for engaging said anchor bar at a location opposite from saidlower surface portion thereof.

2. Means for attaching an air filter to the air inlet housing of acarburetor, a pair of substantially diametrically opposed embossments ofsaid inlet housing, each embossment having an axial slot therein openingupstream and radially inwardly with respect to said housing and alsohaving a radial aperture extending from within the slot through thesidewall of said housing, a substantially U-shaped element having apassage registering with said apertures and having side portionsconfined at its opposite ends within said slots, and anchor bar meansadapted to span the inlet of said carburetor and extending through saidpassage of said U-shaped element, said U-shaped element having a yokeportion engaging the downstream side of said anchor means, cooperatingmeans on said inlet housing and the ends of said bar means to lock themtogether, and means rigidly secured to said U-shaped element andextending upstream therefrom for removably attaching said filter to saidcarburetor, the last mentioned means having an abutment surface spacedfrom and 0pposed to said yoke portion of said U-shaped element forengagement with the opposite side of said anchor bar means.

References Cited in the file of this patent UNITED STATES PATENTS1,898,259 Orern Feb. 21, 1933 1,951,956 Wood Mar. 20, 1934 2,652,901Moler Sept. 22, 1953 2,836,257 Muller May 27, 1958 2,954,096 McMullenSept. 27, 1960

1. MEANS FOR ATTACHING AN AIR FILTER TO THE AIR INLET HOUSING OF ACARBURETOR, A PAIR OF SUBSTANTIALLY DIAMETRICALLY OPPOSED EMBOSSMENTS OFSAID INLET HOUSING, EACH EMBOSSMENT HAVING AN AXIAL SLOT THEREIN OPENINGUPSTREAM AND RADIALLY INWARDLY WITH RESPECT TO SAID INLET HOUSING ANDALSO HAVING A RADICAL APERTURE EXTENDING FROM WITHIN THE SLOT THROUGHTHE SIDEWALL OF SAID HOUSING, EACH EMBOSSMENT PROVIDING A BASE FOR ITSSLOT AT THE DOWNSTREAM END THEREOF, A MEMBER ADAPTED TO SPAN SAID INLETHOUSING HAVING A CHANNEL THEREIN REGISTERING WITH SAID APERTURES ANDHAVING A BOTTOM WALL SUPPORTED AT ITS OPPOSITE ENDS ON SAID EMBOSSMENTSAT THE BASE OF EACH SLOT, THE CHANNEL SIDES OF SAID MEMBER AT SAIDOPPOSITE ENDS BEING CONFINED WITHIN SAID SLOTS RESPECTIVELY, AN ANCHORBAR HAVING END PORTIONS ENGAGED IN SAID APERTURES AND A LOWER SURFACEPORTION ENGAGING SAID BOTTOM WALL OF SAID CHANNEL, COOPERATING MEANS ONSAID INLET HOUSING AND SAID ANCHOR BAR FOR LOCKING SAID BAR THEREIN, ANDMEANS EXTENDING INTO SAID CHANNEL AND SECURED TO SAID MEMBER FORREMOVABLY ATTACHING SAID FILTER TO SAID CARBURETOR, THE LAST NAMED MEANSHAVING AN EXTREMITY SPACED FROM AND OPPOSED TO SAID BOTTOM WALL OF SAIDCHANNEL FOR ENGAGING SAID ANCHOR BAR AT A LOCATION OPPOSITE FROM SAIDLOWER SURFACE PORTION THEREOF.